Gabler, R. E., & Robert E. Gabler. (2007). IE Ess Phys Geo-Physgnow 8e. CA: Cengage Learning, Inc.
Čikaški stil citiranjaGabler, Robert E., i Robert E. Gabler. IE Ess Phys Geo-Physgnow 8e. CA: Cengage Learning, Inc, 2007.
MLA način citiranjaGabler, Robert E., i Robert E. Gabler. IE Ess Phys Geo-Physgnow 8e. CA: Cengage Learning, Inc, 2007.
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